[zeestephen]

There are NO reliable GLOBAL temperatures before 1980.

The first temperature satellites did not appear until 1979.

A world wide network of ocean surface temperature buoys did not exist before 1980.

A comprehensive network of polar temperatures did not exist before 1980.

This is pure speculation - and zero science!

[zeestephen]

Real climate scientists determine global heating and cooling by comparing the current monthly average temp to a 30 year monthly average temp, and then plotting the deviation of the current monthly temp from the 30 year average.

Only Political Scientists use actual temperatures, because actual temps have a significant risk for anomaly errors.